Categories: Ducati

Ducati 100 Gran Sport Marianna (1955-58)

The Ducati 100 Gran Sport “Marianna” motorcycle was produced from 1955 to 1958. It featured a four-stroke, single-cylinder engine with a capacity of 99.66cc and a maximum power output of 6.7kW at 9000rpm. The motorcycle had a compression ratio of 8.5:1, air-cooling, and a forced oil sump lubrication system. The bike had a wet, multi-plate clutch and 4-speed transmission with a final drive chain. The frame was a single tube, open cradle frame in tubular steel with hydraulically damped telescopic forks as the front suspension and a swingarm with dual shocks for the rear suspension. The front and rear brakes were both drum brakes by Amadori. The bike had a top speed of 130km/h or 81mph and weighed 80kg or 176lbs. The front and rear tires were both 2.75-17 and the wheelbase was 1250mm or 49.2in. Overall, the Ducati 100 Gran Sport “Marianna” was a powerful and lightweight motorcycle, perfect for racing or cruising.


Technical specifications:

Make Model: Ducati 100 Gran Sport “Marianna”

Year: 1955 – 58

Engine: Four stroke, single-cylinder, OHC, shaft and bevel gears, 31 mm inlet valve, 27 mm exhaust valve

Capacity: 99.66 cc / 6.08 cu in



Bore x Stroke: 49.4 x 52 mm

Compression Ratio: 8.5:1

Cooling System: Air cooled

Lubrication System: Forced oil sump

Induction: Dell’Orto SS1, 20 mm

Ignition: Battery coil

Starting: Kick

Max Power: 6.7 kW / 9 hp @ 9000 rpm

Clutch: Wet, multi-plate

Transmission: 4 Speed

Final Drive: Chain

Frame: Single tube, open cradle frame in tubular steel

Front Suspension: Hydraulically damped telescopic forks


Rear Suspension: Swingarm, dual shocks

Front Brakes: Drum, Amadori

Rear Brakes: Drum, Amadori

Front Tyre: 2.75 -17

Rear Tyre: 2.75 -17

Wheelbase: 1250 mm / 49.2 in

Dry Weight: 80 kg / 176 lbs

Top Speed: 130 km/h / 81 mph
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